When we went to the moon and realized that the Soviet Union had no realistic plans of getting to the moon, then we stopped going to the moon.

I'm not hard to find. I'm all over the Internet.

Newton came up with Newton's laws of motion and gravity. They worked. They were working.

... informed ignorance provides the natural state of mind for research scientists at the ever-shifting frontiers of knowledge. People who believe themselves ignorant of nothing have neither looked for, nor stumbled upon, the boundary between what is known and unknown in the cosmos.

The greatest of people that have ever been in society, they were never versions of someone else. They were themselves.

Extreme skepticism and extreme gullibility are two equal ways of not having to think at all. And I don't think I'm the first to say that.

Once upon a time, people identified the god Neptune as the source of storms at sea. Today we call these storms hurricanes.... The only people who still call hurricanes acts of God are the people who write insurance forms.